T
Texasgs
Guest
I have this set of VM33 Mikuni's I bought new back in the 80's I put them on an 81 GS1100E, and only put about 3,000 miles on them. I pulled them off when I broke the crank on the bike, and they sat on the shelf bagged up in a box for 25 years. I rediscovered them, and decided I would use them on a 82 GS1100E with a big bore kit that is in the works (75mm) I broke them totally down, I mean all the way, and soaked them in berrymans chemdip for 48 hours and meticulously cleaned them blew out all the passages and jets, reassembled them, with new bowl gaskets. The needles and seats looked great. I replaced all the O rings I saw. Now these beautiful clean pieces of s*#t leak like a sieve. It is like the needles and seats are bad. I popped them open and checked out the float level, and the needles, and even the round gaskets for the seat where it screws into the body of the carb. Every thing looks 100%, but they still leak. Has anyone here dealt with the VM33's enough to tell me what the problem might be. I started to buy new needles and seats, but if there is an O ring out of sight I didn't see that can do this, I would like to find it before I spend a lot of bucks on the new needles and seats. They cost about $100. I cant help think that there is something I am missing here. Possibly something the Berrymans ate into and dissolved. It might just be needle and seat time, but they look pristine. My next step is to take them and run some mineral spirits into the gas inlets with my motorcycle IV gas bottle and manually push the floats up to see if they still flood. I have literally rebuilt hundreds of carbs, bikes, cars, and aircraft, but this one has me scratching my head. If someone knows some trick for these I am all ears.
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